English and Chinese language support and the brainchild of investor Star Xu. OKEx is to OKCoin as Coinbase is to GDAX – both exchange sets cater to different groups of investors. Both OKEx and GDAX are geared toward more professional cryptocurrency traders. OKex Review Originally founded in 2014 in China, OKEx is the second-largest cryptocurrency exchange in the world by volume. Its Bitcoin future arm alone does nearly $1.5 billion in volume every day. Like competitor Binance, OKEx has recently relocated to the crypto-friendly island nation of Malta. Visit OKEx Which Countries can Trade on OKEx? Contents [show] OKEX has a comparatively high standard among cryptocurrency exchanges for exactly who can participate. OKEX is not currently available for citizens of Hong Kong, Cuba, North Korea, Iran, Crimea, Sudan, Malaysia, Syria, the USA and its territories, Bangladesh, Ecuador, Bolivia, and Kyrgyzstan.